WO2015161888A1

WO2015161888A1 - Decoupling mat for a surface covering structure that can be covered by covering elements

Info

Publication number: WO2015161888A1
Application number: PCT/EP2014/058407
Authority: WO
Inventors: Walter Gutjahr
Original assignee: Ardex Anlagen Gmbh
Priority date: 2014-04-24
Filing date: 2014-04-24
Publication date: 2015-10-29
Also published as: US10968641B2; AU2019204876A1; CN106687653A; AU2019204876B2; CN106687653B; MX2016013848A; AU2014391856A1; RU2016145909A; RU2669815C2; US20170292278A1; CA2946652C; RU2016145909A3; BR112016024821A2; CA2946652A1; BR112016024821A8

Abstract

A decoupling mat (1) for a surface covering structure that can be covered by covering elements has a strip- or plate-shaped compensation element (2) which has upwardly projecting formations (4) arising from a lower support plane (3), which formations form an upper covering plane (6) at a distance from the lower support plane (3) and are arranged spaced apart from one another and have at least in sections an undercut (8) along their periphery. A water-permeable cover is fixed on a bottom side (12) of the lower support plane (3) and prevents penetration by a viscous adhesive into the upwardly projecting formations (4). On at least some formations (4), the undercuts (8) are arranged along a region, extending in a curved manner, along a side wall of the upwardly projecting formations. A plurality of first undercuts (8) is oriented in a first direction and a plurality of second undercuts (8) is oriented in a second direction. The cover may have a perforation or consist of a water-permeable textile woven fabric or sheet, or of a water-permeable non-woven fabric (13). A plurality of adjacent formations (4) are respectively connected to one another by ventilation ducts (7) projecting from the lower support plane (3), wherein the ventilation ducts (7) do not extend up to the upper covering plane (6).

Description

Walter Gutjahr

Decoupling mat for covering surface covering with covering elements

The invention relates to a decoupling mat for a coverable with covering elements surface covering structure, with a web or plate-shaped compensation element, starting from a lower support level upwards

Having projecting formations which form an upper support plane at a distance to the lower support level. From practice diverse decoupling mats are known, which are arranged under a floor covering or behind a wall covering. On the one hand, such decoupling mats are intended to be sufficiently durable and durable

Ensure connection of the floor or wall covering with the respective substrate and on the other hand prevent between the floor or wall covering and the respective

Underground mechanical tensions occur, which can lead to damage of the coating or to a partial detachment of the coating from the substrate.

In particular, on heated floor structures that are exposed to changing temperatures, both between the covering elements on the one hand and the substrate on the other hand, but also over a time course away greater temperature fluctuations occur. The materials used in each case usually have a different expansion behavior Temperature fluctuations, so that, for example, in changing temperatures or direct sunlight in the vicinity of window fronts significant mechanical

Tensions between the flooring elements and the substrate may occur.

Most decoupling mats have a profiled surface with a large number of protruding ones

Formations and depressions. It has been shown that at the most numerous projections and

Wells horizontally acting shear forces can be reduced. In conjunction with nonwoven webs and mesh fabrics that are single-sided or double-sided

Compensation element can be set, a

highly loadable connection of the decoupling mats to the substrate and to an adhesive mortar or other suitable fastening material can be effected, with which the covering elements are fixed to the decoupling mat. It has been found that such decoupling mats, as described, for example, in EP 1 073 813 Bl or in US Pat. No. 5,619,832, can ensure a decoupling effect sufficient for many fields of application. However, it is considered a disadvantage that such decoupling mats are often impermeable to water

Separating layer between the ground and the

Form covering elements. In practice, usually mineral adhesive mortar or other initially pasty and then curing adhesive materials on the

Substrate applied to a flat surface

generate and the decoupling mats on the ground set. If the decoupling mats are laid immediately thereafter on the not yet fully cured adhesive mortar, the release of moisture from the adhesive mortar is hindered and delayed curing of the adhesive mortar, the longer moist and not complete

remains resilient, so that subsequent trades

also delay. While in some cases one

watertight sealing of the covering elements to the

Underground is desired leads the profiled

Surface of the decoupling mats regularly to one

Accumulation and retention of moisture in the

projecting formations and depressions. In

Outdoor areas may e.g. both by frequent

Moistening and drying cycles cause discoloration or, especially in the case of frost, damage to the covering elements or the laying mortar.

There are known from practice various drainage mats, which are moisture-permeable and reduce unwanted accumulation of moisture below or above the drainage mats or even

completely exclude. Separate

Exemplary embodiments are described, for example, in DE 298 07 258 U1 or in US Pat. No. 6,151,854.

The different requirements for a mechanical decoupling on the one hand and the most efficient dehumidification on the other hand, however, often lead to that known from the prior art

Decoupling mats or drainage mats are not equally suitable for all uses. A complex shape of the sheet or plate-shaped Compensation element, usually from a

made of suitable plastic material, also leads in conjunction with fixed thereon Verkrallungsvlies and lattice mats to a relatively high

Production expense.

It is therefore regarded as an object of the present invention to design a decoupling mat of the type mentioned in the introduction in such a way that the best possible decoupling effect can be achieved with the lowest possible production outlay. In addition, it would be desirable if the decoupling mat does not encapsulate the moisture contained in the substrate or in a screed or adhesive mortar, but allows and favors a quick dissipation of moisture.

The object is achieved in that the formations are spaced from each other, that the formations along its circumference at least

Sectionally have an undercut and that on a bottom of the lower support level a

water-permeable cover is set, the one

Preventing penetration of a viscous adhesive material in the upwardly projecting protrusions. The spaced-apart formations allow efficient absorption and removal of shear stress or comparable horizontal in a plane of the

Compensation element acting mechanical

Stresses. By arranged at least in sections along the circumference of the formations

Undercuts can be a high-strength connection or

Clawing of the formations and thus of the Compensation element with an applied on an upper surface of the compensation element adhesive mortar or with an equally suitable adhesive or

Fasteners are guaranteed. The

Undercuts cause a positive determination.

It has been shown that a particularly beneficial

Fixing the applied on the top adhesive mortar or curing adhesive can be promoted by the fact that at least some formations

Undercuts along a curved portion of a side wall of the upwardly projecting formations are arranged. The curved region of the side wall can have either a convex or a concave profile. The undercut in this area can in turn have a straight course of a side edge of the undercut, so that the projecting from the side wall portion of the

Undercut changed along the course of the side wall. It is also possible that the

Undercut along the course of the side edge has a constant projection of the shaping directed outwards or inwards, so that a

Side edge of the undercut parallel to the side wall follows the course of the side wall.

A particularly advantageous embodiment of

According to the invention, it is provided that a plurality of first undercuts in a first direction

are aligned and that several second

Undercuts are aligned in a second direction, the first direction from the second direction is different. If each projecting upwards

Forming has a circumferentially along a side wall only partially formed undercut, the direction in which the undercut protrudes mainly from the relevant area of the side wall of the formation laterally, change from each molding to the adjacent formation. For example, in a plan view of an upper surface of the decoupling mat, the undercuts may protrude to a right and left first formation while the undercuts may protrude to a second formation adjacent to the first one

Formation is arranged, up and down

protrude. Due to the changing direction of

Undercuts can be ensured that in each direction in space a mechanically highly resilient connection between the decoupling mat and one on it

applied adhesive mortar layer or adhesive layer consists. Any shear stresses that occur can be readily compensated in all directions, so that, for example, shrinkages occurring on the sidewalls of the formations with undercuts as well as on sidewalls of the formations without undercuts can be removed during the curing of an adhesive mortar. At the same time, the structured

Compensation element in the course of manufacture are easily removed from the mold, as the orientation of adjacent undercuts changes and the distance

rectified or opposite undercuts can be sufficiently large.

The upwardly projecting formations, on the underside with a water-permeable cover be covered, form cavities and air chambers in which moisture can collect from the ground.

The water-permeable cover may have a perforation. In this case, the cover can be, for example, an inexpensive producible film of a suitable plastic material, which at the bottom of the

Compensating element cohesively or with a

is determined suitable adhesive. The number and dimensions of the individual perforation openings can influence the properties which are relevant for the water permeability. The individual perforation openings expediently have a sufficiently small size

Diameter on to prevent penetration of a not yet fully set screed or adhesive mortar.

An advantageous embodiment of the inventive idea as a result is provided that the cover consists of a water-permeable textile fabric or scrim or a water-permeable non-woven. A textile material or a nonwoven material has a structuring, which favors a clawing of the cover with an initially viscous and later fully cured adhesive mortar or screed material and thereby a durable and mechanically highly durable determination of the

Uncoupling mat on the ground allows.

The textile or non-woven cover may be made of an alkali-resistant material to provide sufficient mechanical strength over a long period of time

to maintain. In order to enable in addition to the individual air chambers, which are each formed in the projecting formations, a contiguous large-scale ventilation and dehumidification of the substrate is provided that a plurality of adjacent formations are each connected by extending along the lower support plane ventilation channels with each other, not the ventilation channels extend to the upper support level. The ventilation channels can be made comparatively flat. The

Ventilation channels connect adjacent formations

with each other, so that an exchange of air and in particular a moisture transport over several, or over many formations away to the edge of the

Uncoupling mat allows and favors. The only in part in the adhesive mortar bed to be applied over it and reducing the cross-section

Ventilation channels contribute to the fact that shrinkage-induced stresses in the adhesive mortar or in the compensation element can be reduced by the formation of microcracks. There is a small cell stress reduction on the

projecting formations and on the ventilation channels instead. The ventilation channels as well as the protruding formations may have undercuts. It is not fundamentally necessary for the ventilation channels to make a major contribution to the mechanical decoupling or to the definition of the lining elements by undercuts or by a similarly suitable shaping. Because the ventilation channels as well as the projecting

Formations create cavities and possibly in Run different directions between the formations and the ventilation ducts contribute advantageously to the reduction of stresses and shear forces between the floor or wall covering and the ground at.

To the decoupling mat from the ground to the

Surface elements permeable to water or

it is to make diffusion permeable

advantageously provided that the

Compensation element has recesses or slots in the lower support level. These recesses or slots form passage openings through which moisture from the bottom to the top of the decoupling mat, or in the opposite direction can pass.

By a diffusion-open design of the

Decoupling mat can be made possible that the

Uncoupling mat on a still wet and

optionally not fully cured substrate can be applied without the still in the

Underground moisture enclosed and prevents the desired drying of the substrate or is delayed excessively. The decoupling mat can therefore promptly, so faster than usual routed after the production of the substrate and quickly with

Covering elements are covered or covered so that no time-consuming and costly waiting times between the individual manufacturing steps are necessary.

The diffusible property of the decoupling mat can be increased by the fact that the cover and the Compensation each recesses or slots, at least partially overlapping

are arranged. In the overlapping areas, the area-covering recesses or slots of the cover and the compensation element form free

Passages that allow unobstructed

Allow moisture transport through these openings. It has been shown that the dimensions of the overlap areas can be given on the one hand sufficiently large for an efficient moisture permeability and on the other hand small enough for a low mechanical coupling, so that the

Decoupling properties of the decoupling mat can not be significantly affected or reduced and at the same time a very effective dehumidifying effect can be made possible.

It is advantageously provided that each upwardly projecting formation has at least one recess in the region of the upper support plane. Thereby, a dehumidification of each air chamber, which is formed in the protruding formations, made possible to the covering elements. The recesses in the region of the upper support level can be produced in a simple manner quickly and inexpensively by the fact that the upper support level of

Compensation element has a perforation. The

Perforation can be generated for example by a spiked roller with a sufficiently high

Contact pressure over the upper support level of the

Rolling compensation element is rolled away. It is too possible to produce the individual recesses by punching, by drilling or slitting the upper support level.

It is also conceivable that the compensation element in the region of side walls of the upwardly projecting

Formations has dehumidifying openings. These

Dehumidification openings can be created, for example, by punching or slitting the compensation element and optionally before or after a determination of the cover on the underside of the compensation element. By the

Dehumidifying openings in the side walls of the upwardly projecting formations can not yet be provided with sufficiently large dimensions of the dehumidification openings

penetrate fully hardened mortar material that is applied to the top of the compensation element to embed the flooring elements or can stick. In this case, the laterally penetrating mortar or adhesive material engages behind the top of the protruding formations, their edges in turn

Undercuts form and a form-fitting

Fixing the applied on top of the compensation element adhesive mortar or adhesive material causes.

By arranged in the region of the side walls

Dehumidifying may optionally in conjunction with a perforation of the upper support level or provided in this area the recesses

Dehumidification effect be favored. In addition to the mechanical decoupling and the

Drainage effect to produce a sound-reducing effect is provided that on the compensation element a Layer made of a material that enhances impact sound

is arranged. The impact sound enhancing material may be a layer of one having a

Binders cross linked bonded sand. There are also known other impact sound reducing materials which are disposed on the compensating element and may be equally suitable.

The layer of an impact sound reducing material can also be loosely produced by a subsequently produced

Fill a suitable free-flowing or

be granular material.

An additional mechanical fixing and fixing of the covering elements at the upper support level of the

Compensation element can be effected by a mesh fabric is arranged on the upper support level. The mesh fabric may for example consist of a high-strength plastic or fiberglass material. The

Mesh size of the mesh fabric is suitably sufficiently large to allow passage of a not yet set and therefore still flowable adhesive mortar, which is applied to the top of the decoupling mat.

The individual projecting formations may have a convex or non-convex cross-sectional area, the cross-sectional area being aligned parallel to the lower or upper support plane. At a

non-convex cross-sectional area is, at least for a few pairs of points within the cross-sectional area, an area of a connecting line of the two points outside of Cross sectional area. The formations may, for example, a kidney-shaped cross-sectional area, a bone-shaped cross-sectional area or a rectangular

Have cross-sectional area. In addition, you can

Forms with different cross-sectional areas on a compensation element be combined with each other.

It is likewise conceivable that, in order to avoid linearly extending weakening lines, adjacently arranged projecting formations are arranged laterally offset relative to one another. In this way it can be avoided that the compensation element is rectilinear and parallel, or at right angles to the side edges of the

Compensation element extending weakening lines

optionally, which coincide with joints between the overlying tiles elements and in which at a mechanical stress with large

Probability of cracks, damage or breakage in the wall or flooring arrangement may occur.

The compensation element can be used for this purpose

have only such weakening lines extending from one side edge to another side edge of the compensation element and having a plurality of aligned at an angle lines of weakness line. Each space between adjacent ones

Formations represents a weakening line section and is part of a weakening line, so that running straight over the compensation element

Weakening lines between the spaced apart formations are excluded. The individual formations can be simple

Basic shapes such as squares or rectangles. Neighboring formations must then be arranged offset to one another, so that formed between two juxtaposed formations

Weakening line section encounters an adjacent, laterally offset formation.

An advantageous embodiment of the inventive concept, it is provided that the formations a

have bone-shaped surface shape. The bone-shaped formations can either rectified laterally offset from one another or each rotated by 90 °, but also be arranged laterally offset from one another. The weakening lines, which run between the individual bone-shaped formations and are delimited by these, have a curved or staggered course everywhere. A rectilinear side edge of a floor covering element arranged on the decoupling mat runs alternately over weakening line sections and over formations, so that longer sections of

Weakening lines with the side edge of the floor covering ^¬ elements is excluded.

It is also conceivable and also advantageous that the formations have an angular surface shape. Adjacent formations, each having an angular surface shape, can be arranged laterally offset from each other so that a corner region of a first formation along its two mutually adjacent side edges to an angular region of a second adjacent molding adjacent. Although each individual formation has rectilinear side edges, longer weakening line portions having a straight-line section line can be avoided.

Depending on the given for the individual formations surface shape, it may be appropriate that at least two groups of formations on the

Compensation element are arranged, which have different orientations. In particular in

Connection with a lateral offset between

adjacent shapes can thereby be used to create complex patterns of shapes that are not longer

Straight line weakening line sections

allow .

Such a decoupling mat can in particular

be used advantageously for decoupling a tile covering from a substrate. For usual

Tile coverings, in which the individual tiles have side edges with a length between 20 cm and 60 cm, it is advantageous that a maximum distance of two

opposite side edges of each formation in a range between 1 cm and 15 cm, preferably in a range between 1.5 cm and 5 cm. In this way, it can be ensured that every single one

Tile that is laid on the decoupling mat, a greater number of formations and, accordingly, a greater number of individual straight running

Weakening line sections covered. Hereinafter, embodiments will be discussed in more detail, which are shown in the drawing. It shows:

Fig. 1 is a perspective view of a schematic representation of a decoupling mat with a web-shaped compensation element with square protruding

Moldings and ventilation channels, which connect the formations together, Fig. 2 is a sectional view of that shown in Fig. 1

Decoupling mat along the line II - II, wherein on an upper side of the compensation element a

Kick-sound-reducing layer and at an upper

Support level a grid mat are arranged

3 shows a perspective view of a decoupling mat with convexly configured convex formations which are arranged offset relative to one another, FIG. 4 shows a view of an upper side of a decoupling mat similar to FIG. 1, the undercuts being on

curved side wall portions of the formations are formed and the undercuts of adjacent

Projecting protrusions in different directions,

Fig. 5 is a sectional view of that shown in Fig. 4

Decoupling mat along the line V-V in Fig. 4,

6 shows a schematic view of an upper side of a compensation element with projecting angled formations, 7 shows a schematic view of an upper side of a compensation element with bone-shaped formations,

Fig. 8 is a schematic view of an upper side of a compensation element with differently designed

bone-shaped formations,

Fig. 9 is a schematic view of an upper side of a compensation element with again different

designed bone-shaped formations, and

10 shows a schematic view of an upper side of a compensation element with shell-shaped formations.

The decoupling mat 1 shown in FIGS. 1 and 2 has a compensation element 2 designed in the form of a web. Starting from a lower support level 3, upwardly projecting formations 4 with a square cross-sectional area are formed on the compensation element 2. Escaping aligned tops 5 of

projecting formations 4 form an upper

Support level 6. Between the individual projecting

Formations 4 run ventilation channels 7, which connect the adjacent formations 4 together. The ventilation channels 7 extend along the lower support level 3 and extend in the direction perpendicular to the lower support level 3 not up to the upper support level 6, but only in a maximum height of about one-third to half the height of the protruding formations. 4 The protruding formations 4 point along one

Circumferential section sections undercuts 8, which are arranged in the region of the upper support level 6. An applied on top of the decoupling mat 1 from above

Adhesive mortar 9, which is shown only in Fig. 2, can penetrate into intermediate spaces 10 between the spaced-apart protruding formations 4 and the

Undercut 8 engage behind, so that a positive connection of the adhesive mortar 9 with the

Compensation element 2 results.

In the tops 5 of the protruding formations 4, a number of recesses 11 are formed in each case. The recesses 11 were made using a spiked roller

subsequently introduced into the compensation element 2. The dimensions of the individual recesses 11 are on the one hand sufficiently small to prevent penetration of the top

applied Klebemörtels 9 in interiors 12 of

Forms 4 to prevent. The dimensions of the

Recesses 11 are at the same time sized large enough to the top 5 and the upper support level 6 of the

Compensation element 2 sufficient

permeable to moisture, so that any existing or emerging

Moisture gradient between below the bottom

Support level 3 and above the upper support level 5 can be compensated in a short time.

On a bottom 12 of the lower support level 3 is a Verkrallungsvlies 13 on the compensation element. 2

established. The Verklallungsvlies 13 is immediately after the production of the existing plastic Compensation element 2 is pressed into the still soft and sticky plastic material and thereby high-strength connected to the compensation element 2. Immediately above the upper support level 5, a mesh fabric 14 is fixed to the tops 5 of the protruding formations 4. This mesh fabric 14 of a suitable fiber material serves as well as the

Undercuts 8 of the definition and connection of the top applied and initially pasty Klebemörtels 9, which encloses the mesh fabric 14 sections and then cured.

On the compensation element 2, a layer 15 is arranged made of a material for improving the impact sound, which is mainly projecting between the individual

Formations 4 is located. As an impact sound-improving material, a binder crosslinked with a binder

bound sand can be used. It could also be a suitable foam material or a free-flowing

Granular material can be used to reduce sound transmission and noise generation.

The decoupling mat 1 is shown in FIG. 2 together with the surrounding floor covering structure. The

Decoupling mat 1 can be laid directly on a substrate 16 or glued to the substrate 16. In the adhesive mortar 9, which is applied from above on the decoupling mat 1, floor tiles 17 are made of a

ceramic material or embedded in stoneware. The decoupling mat 1 can also be used to attach a wall panel to a wall.

In FIG. 3, by way of example only, a deviating variant of a decoupling mat 18 is shown

shown. An in this decoupling mat 18th

used compensation element 19 has kidney-shaped protruding formations 20 which have a non-convex cross-sectional area. The top 5 of the

kidney-shaped protruding formations 20 is not perforated and has no openings. The

Undercuts 8 are located only at some end portions 21 of the protruding formations 20. Between the protruding formations 20 are

Through openings 22 formed in the lower support level 3 of the compensation element 19. The

Passage openings 22 are in the exemplary

Embodiment of FIG. 3 shown as circular holes or punches. However, the passage openings 22 may also be in the form of strip-shaped slots or

Milling be formed in the lower support level 3.

In the decoupling mat 23 shown in FIGS. 4 and 5, formations 24 with a nearly square cross-sectional area in are provided on the compensation element 2

arranged at regular intervals from each other and connected to each other through the ventilation ducts 7. The formations 24 each have two opposing and straight side wall portions 25 and two opposite, curved or concave

extending side wall portions 26 on. The respectively at the concave extending side wall portions 26 formed undercuts 8 protrude at adjacent formations 24 each in different directions laterally beyond the concave side wall portions 26. The

Alignment of the undercuts 8 alternates with adjacent arranged formations 24th

At the bottom 12 of the lower support level 3 of

Compensation element 2, the Verkrallungsvlies 13 is attached. The compensation element 2 has passage openings 22 formed between the formations 24 in each case in the lower support plane 3.

A compensation element 2 shown schematically in FIG. 6 is made of a rigid plastic film. The compensation element 2 has at its top regularly and laterally offset

arranged on each other angular formations 27. Only on a side edge of the compensation element 2, the formations 27 correspondingly adapted and deviating from the angular shape shapes. Between adjacent formations 27 lines of weakness 28 are formed, extending over the entire bottom of the

Can extend compensation element 2 away. The

Weakening lines 28 consist of individual mutually merging lines of weakness 29 and 30, which extend horizontally and vertically in the illustration in FIG.

The individual weakening line sections 29, 30 each extend in a straight line until an end region of the relevant weakening line section 29, 30 meets an adjacent shaping 2 or until an end region of a straight line line of weakness 29, 30 meets within a molding 2 on a corner 31 in the molding 2. In each case, the changes

Alignment of the adjacent weakening line section 29, 30 and thus the course of the weakening line 28th

As can be seen from FIG. 6, straight lines of weakness 29, 30 extend beyond at most two adjacent formations 2. In each case two adjacent formations 2 are located with a lateral

Offset two more formations 2 opposite. The respective opposite formations 2 form the lateral boundary for the weakening line sections 29 and 30. The distance between two opposite formations 2 and thus the width of the individual

Weakening line sections 29, 30 is some

Millimeter. Since rectilinear weakening line sections 29, 30 can each extend only maximally along two adjacent formations 2, the maximum length of a straight line of weakness 28 is limited

is inevitably formed in the manufacture of the floor covering structure.

The individual angular formations 2 point

suitable dimensions of the angle-connected leg, so that in a lateral offset of adjacent, or opposite formations 2 only shortest possible straight line lines of weakness 29, 30 are formed.

In Fig. 7 is an example of an upper side of a

Compensation element 2 shown with formations 32, wherein the individual formations 32 a bone-shaped

Shaping have. In this embodiment, as in the embodiment shown in Fig. 6 is a non-convex shape. The arrangement of adjacent formations 32 with an offset in both spatial directions also in this embodiment straight line lines of weakness 29, 30 are limited to short areas and also each extend at most along two adjacent formations 32. Each adjacent formations 32 are so narrow

arranged side by side, that the formations 32 would extend in some areas in a surface surrounded by an adjacent formation 32 on two or three sides and would overlap, if the adjacent formation 32 would have no recess there.

In the region of the convex side wall portions 33 of the bone-shaped formations 32 are respectively

Undercuts 8 formed, wherein in Fig. 7, for example only in an upper right portion of the figure, the undercuts 8 are shown. By the opposite arrangement of undercuts 8 advantageous adhesive and deformation properties at a shear stress of resting on the compensation element 2 flooring are relative to the ground

allows.

In FIGS. 8 and 9, further exemplary embodiments for a compensation element 2, each with bone-shaped formations 32, are shown by way of example only. In the embodiment of FIG. 8, the side walls 34 have a much rounded course compared to the embodiments of FIGS. 7 and 9. In the embodiment of FIG. 9 are the

bone-shaped formations 32 very similar to the

however, in the exemplary embodiments according to FIGS. 8 and 9, respectively adjacent bone-shaped formations 32 are aligned rotated by 90 ° with respect to one another.

In an embodiment according to FIG. 10, the individual formations 35 each have a shell-shaped one

Shaping up.

In the exemplary embodiments according to FIGS. 6 to 10, the individual formations 27, 32 and 35 respectively have undercuts 8, which are shown by way of example only in small areas, along a circumference of the formations 27, 32 and 35. By in some variants in different directions in pairs arranged undercuts 8, an advantageous stapling effect is achieved, which allow a particularly high mechanical strength of the compensation element 2 and a concomitant advantageous compensation and compensation effect between a floor covering 17 and the ground 16.

The undercuts 8 can in all

Embodiments optionally to individual

Peripheral portions of the formations 4, 20, 24, 27, 32 and 35, on opposite regions of the formations 4, 20, 24, 27, 32 or completely along the circumferential lines of the formations 4, 20, 24, 27, 32 may be formed. The tops 5 of the support planes 6 of the formations 4, 20, 24, 27, 32 may optionally have moisture-permeable recesses 11, as is indicated by way of example in a single area at the top right in Fig. 9, or be formed closed.

Claims

Walter Gutjahr P onent claims

1. decoupling mat (1, 18, 23) for one with

Covering elements coverable surface covering structure, with a sheet-like or plate-shaped compensation element (2, 19), the starting from a lower support plane (3) upwardly projecting formations (4, 20, 24, 27, 32, 35)

has, which form at a distance to the lower support level (3) an upper support level (6), characterized

in that the formations (4, 20, 24, 27, 32, 35) are arranged at a distance from each other, that the

Formations (4, 20, 24, 27, 32, 35) along their circumference at least partially an undercut (8) and that on a bottom (12) of the lower support level (3) has a water-permeable cover

is fixed, the penetration of a viscous

Adhesive material in the upwardly projecting protrusions (4, 20, 24, 27, 32, 35) prevented.

2. decoupling mat (18, 23) according to claim 1, characterized in that at least at some formations (20, 24, 32, 35) undercuts (8) along a curved portion extending a side wall (26) of the upwardly projecting protrusions (20 , 24, 32, 35) are arranged.

3. decoupling mat (23) according to claim 1 or claim 2, characterized in that a plurality of first opposing undercuts (8) are aligned in a first direction and that a plurality of second

Undercuts (8) are aligned in a second direction.

4. decoupling mat (1, 18, 23) according to one of

preceding claims, characterized in that the cover has a perforation.

5. decoupling mat (1, 18, 23) according to one of

preceding claims, characterized in that the cover consists of a water-permeable textile fabric or scrim or of a water-permeable nonwoven fabric (13).

6. decoupling mat (1, 18, 23) according to one of

preceding claims, characterized in that a plurality of adjacent formations (4, 20, 24, 27, 32, 35) in each case by the lower support level (3)

projecting ventilation ducts (7) are interconnected, wherein the ventilation ducts (7) do not extend to the upper support level (6).

7. decoupling mat (18, 23) according to one of the preceding claims, characterized in that the

Compensation element (19, 2) recesses (22) or

Slots in the lower support level (3).

8. decoupling mat (18, 23) according to claim 7, characterized in that the cover and the

Compensation element (19, 2) each recesses (22) or Slots that at least partially

are arranged overlapping.

9. decoupling mat (1) according to one of the preceding

Claims, characterized in that the

Compensation element (2) in the region of the upper support plane (6) has a number of recesses (11).

10. decoupling mat (1) according to claim 9, characterized

characterized in that each upwardly projecting

Shaping (4) has at least one recess (11) in the region of the upper support plane (6).

11. decoupling mat (1) according to claim 9, characterized

characterized in that the upper support plane (6) of the

Compensation element (2) has a perforation.

12. decoupling mat (1, 18, 23) according to one of

preceding claims, characterized in that the compensation element (2, 19) in the region of side walls of the upwardly projecting formations (4, 20, 24) dehumidifying openings.

13. decoupling mat (1, 18, 23) according to one of

preceding claims, characterized in that on the compensation element (2, 19) a layer (15) is arranged made of a material for improving the impact sound.

14. decoupling mat (1, 18, 23) according to claim 13, characterized in that on the compensation element (2, 19) a layer (15) of one with a binder

networked bound sand is arranged.

15. decoupling mat (1, 18, 23) according to one of

preceding claims, characterized in that on the upper supporting plane (6) a mesh fabric (14)

is arranged.

16. decoupling mat (18) according to one of the preceding claims, characterized in that to avoid straight lines of weakness extending lines (28) adjacently arranged projecting formations (20, 32, 35) are arranged laterally offset from one another.

17. decoupling mat (18) according to any one of the preceding claims, characterized in that the projecting formations (20, 27, 32, 35) have a lower support plane (3) parallel non-convex cross-sectional area.

18. decoupling mat (18) according to claim 17, characterized in that the formations (32) a

have bone-shaped surface shape.

19. decoupling mat (18) according to claim 17, characterized in that the formations (27) a

have angular surface shape.

20. decoupling mat (18) according to any one of the preceding claims, characterized in that the formations (4, 24, 27, 32, 35) on two opposite sections of side walls (26, 33) of the formations (4, 24, 27, 32 , 35) have an undercut (12).